Backlight issue => bad connector screen solderings?

Hello,

I get an iphone 5 which go into some water (red sticker)

All is working except the backlight which works but at a low level so to determine if it was a problem from the motherboard or the backlight itself, I put another working screen on it and.... the same thing however when I test it the screen wasn't in its compartiment so I can slightly moved the screen (and the connector is a little affect to this action too) and the backlight is directly affect; more bright or less depend on the orientation of the screen.

So I looked closely on the screen connector and it seems that the screen connector is badly solder on 4 pins (judge by yourself thanks to my pictures), can you tell me or confirm that these pins are used by the backlight ? or just send me the scematics of this chip

Your backlight filters are not the components that are burned/corroded in your picture, but they are near--you should replace them and backlight coil.

You will certainly have corrosion under those shields--desolder and clean.

Jessa

Yes those pins are bad---and so are your backlight filters--i circled them for you. You need to get all that fixed up if you want your display to work---and given that you have obvious corrosion in the areas you can see, I would bet that you would also be highly likely to have corrosion in the areas you can't see under the EMI shields covering 90% of the board. Get them off, get everything cleaned, replace all your damaged components---otherwise you'll have a dead phone soon enough---that's just the way it seems to go.